I first saw it on this board and had to have it also. You can Google Spicy Spiral Tablerunner and come up with places to order it. You also have to buy a special ruler. It either a 9 or 10 degree ruler. When you do order it, get the longer of the 2 offered. The extra length helps. I'm sorry, I don't remember where I got mine.
The cutting is a little strange, and you end up with something that looks like swiss cheese. They are so awesome when they are done!